Question

if a compound has 7 total atoms is it 2NaOH, H2SO4, or 3CO2

Answer 1

To determine which of the compounds has a total of 7 atoms, we need to count the atoms in each one.

1. **2NaOH**:
- This indicates 2 moles of sodium hydroxide (NaOH).
- Each NaOH contains 1 sodium (Na), 1 oxygen (O), and 1 hydrogen (H).
- So, 2NaOH has:
- 2 Na
- 2 O
- 2 H
- Total: 2 + 2 + 2 = 6 atoms.

2. **H2SO4**:
- This compound consists of:
- 2 hydrogen (H)
- 1 sulfur (S)
- 4 oxygen (O)
- Total: 2 + 1 + 4 = 7 atoms.

3. **3CO2**:
- This indicates 3 moles of carbon dioxide (CO2).
- Each CO2 has 1 carbon (C) and 2 oxygen (O).
- So, 3CO2 has:
- 3 C
- 6 O
- Total: 3 + 6 = 9 atoms.

Based on the calculations, **H2SO4** is the compound that has a total of 7 atoms.